A massive rock fall trapped the men as they operated a tunnelling machine.

那些男人在驾驶隧道掘进机时，一次大面积的岩崩困住了他们。

《柯林斯英汉双解大词典》

This paper puts forward a main working procedure and technique demand about building monitoring net (station) of rock fall and landslide.

本文提出了对崩滑地质灾害监测网(站)建网方案进行优选设计的主要工作程序和技术要求。

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Now the reinforcement of the tomb pit slope is finished, the surface strength of rock slightly increases, and the case of rock fall decreases significantly.

目前墓坑边坡加固已经完成，岩石表层强度有所增加，而碎石崩塌现象明显减小。

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Walls of rock fall away sharply at your feet.

VOA: special.2009.10.07

"The first time we visited this rock last fall - there were maybe one or two children out of 15 who knew how to climb up this."

VOA: standard.2010.06.25

The authority also reported rock fall on slopes below the bridge north of Blacknor.

BBC: Swanage landslip

The rock fall happened at Jiggers Bank, a main road into the Ironbridge Gorge, overnight on Tuesday.

BBC: Rock fall closes Jiggers Bank in Shropshire

The local authority said the road was covered by a further 50-tonne rock fall on Wednesday night.

BBC: Ironbridge Jiggers Bank road remains closed